PCOS and late periods

1st time my period was late for a whole month. Last time this happened was a year ago. I usually get my period the 1st and the last of the month or during the middle. I haven't had a whole month without my period. Being more aware of my body since my doctor told me I have PCOS. This is just bugging me. How a year later I missed a whole entire month. My boyfriend who has yet to get tested like my doctor suggested wants me to take a pregnancy test. But I honestly feel like it's a waste of money. I don't know what to do. I need my period to start already. (FYI I have had no period symptoms like I usually have)